Gas burner



p 1952 R. c. WRIGHT 2,609,866

GAS BURNER Filed July 11. 1949 ZEU- fl TTUR/VE/ Patented Sept. 9, 1952 GAS BURNER 7 Richard 0. Wright, Bay Village-Ohio, assignor to Iron Fireman Manufacturing land, Oreg.

Company, Port- Applicatloniluly 11, 1949, Serial No. 1024;045

4 Claims. (01.- 158-4) This invention relatesgenerally to equipment for controlling thesupply and combustion of a gaseous fuel. -More particularly the invention comprises an improved burner head for the supply and controlof an aerated gaseou fuel to a furnace of the type used for residential heating, to-

ether with accessory means for controlling a secondary and a tertiary-supply of air to the fuel during combustion.

It is a particular object of this. invention to provide an equipment for the efficient combustion of some commonly available gaseous fuels such as the so-called liquid petroleum gases, butaneand propane, which have been found. dithcult to control with the prior art burners.

A second object of thisinvention is to provide such a gas burnerequip-ment which is simple and economical to build,.easy to install and service and stable in operation. To attain the above objects-it is another objectof this invention to provide a burner head of heat resisting metal which will not grow or deteriorate under severe operating conditions and which has horizontally directed ports which will not become plugged with falling scale or other material.

Another object is to providea burnerhead with relatively large. substantially horizontal ports and capable of successful operation at such high port loadings as 80,000 to 100,000 British thermal units per square inch of port area without the flame becoming unstable and leaving the ports.,.

Another object is to provide a burner of the type described with accessory air controlling means which will control thesequential supply of air to the burning gases from the burner ports in such a way that at no time during the combustion will the flame be starved of air and tend to move away from the port to seek additional air.

How these and other objects are-attained will be apparent from the following description referring to the attached drawing in which:

i Fig. 1 is a fragmentary elevation in partial section of the burner of this invention installed in.

a typical residential heating furnace.

...Fig. 2 is a fragmentary plan view in partial section of the installation of Fig. 1 taken along the line 2-2 of Fig. 1.

Fig. 3 is an elevation in partial section of the gas supply head of this invention.

Fig. 4 is an elevation along the line 6+5 of Fig.

1 l and shows the type of air shutter in common use for controlling the primary air mixed with the gas before emission from the burnerhead ports.

casing l I, supported on casing ring [2, a combustionchamber 13, having an access door 14, a hearth support I5 sealed to chamber l3 and a burner cabinet I6 sealed to casing l I, chamber l3 and support l5. Secondary and tertiary. air for'c'ombustion is induced by natural draft from the spacer outside. the casing through louvers H in 'door.l8 of cabinet [6.

Segmental refractory hearth l9 and segmental wall tile 20 are placed in their positions shown after the removal of access doors M and i8 and their introduction thercthrough.

Gas supply pipe 2| supplies fuel gas toVenturi elbow 22 intowhich primary air for combustion is induced through openings 23 adjustably controlled by shutter 24 rotatably mounted on inlet extension 25 of elbow 22.

Elbow 22 is preferably a metal casting having cast'thereon a rear support leg 26 and a front leg su port bracket 21 having a hole therein for the insertion of bolt 28 securing elbow 22 in place on floor 29 of cabinet I6. Angle leg 30resting on room floor 3| may be added for increased sta: bility if desired.

Also cast on elbow 22 is pilot support'bracket 32 on whichmay be supported and positioned, as shown, 'a common type of pilot burner and heat sensitive control indicated generally-at 33. V

The burner headis made of a stainless steel top stamping 34 and a similar bottom stamping 35. Burner headcollar- 36 has 'a'conical interior surface 31; circumferentialgrooves 38 on its outer surface anda thin vertical extension 39 which is assembled through a relatively large central hole in bottom stamping 35 and spun over the lip of the hole in stamping 35, as shown, thus secur- Stampings 34 and 35 are secured together by spot welding at the lands 4! between theports 40.

Snap ring 42 can" be placed as required in any of the grooves and becomes the "support for upwardly diverging conicalair'ring 43.

Upward extension 44 of elbow22 is threaded into elbow 22 as shown and is vertically positioned by the addition or removal of one or more spacing'washers 45. The upper end of extension 44 has conical .outer surface 46 mating with and supporting on its inner surface 31 burner hea collar 36. s

Segmental .refractoryhearth- I9 has central circular secondary air port 41 deformed at one side to provide a refractory boundary for the hearth opening required for the pilot equipment 33.

Hearth [9 also has annular tertiary air opening 48 interrupted only as at 49 as required for construction.

Hearth support i has a large central opening to supply secondary and tertiary air. This opening is enlarged at one side to provide a passageway therethrough for pilot 33.

In operation the primary air supplied is controlled by adjustment of shutter 24. secondary and tertiary air is controlled by the draft available and the total restriction through the furnace including the louver openings ll.

The division of secondary and tertiary air and particularly the point of injection of secondary air into the flame is controlled by the number of washers used and the particular groove 38 into which snap ring 42 is placed.

, Having thus explained the construction of the gas burner of this invention and indicated its mode of operation.

I claim:

1. In a burner for gaseous fuels: a burner head comprising a top member, a bottom member, means vertically positionable on said bottom member, and an air deflecting ring supported on said means; said top member comprising an inverted dished plate having a circumferential,

radially corrugated, horizontal flange; said bottom member comprising an upright dished plate having a circumferential, radially corrugated horizontal flange and a downwardly extending inlet collar concentric with and smaller than said flanges; said inlet collar being formed with an upwardly converging conical inner surface and a grooved cylindrical outer surface; said means being adapted to surround said collar closely and rest in an annular groove in said surface; said top member being axially aligned with said bottom member and rotationally fixed with respect to said bottom member whereby the depressed corrugations of said top member flange will register with the depressed corrugations of said bottom member flange to form horizontal, radial,

gas outlet parts; said air deflecting ring having a continuous upwardly diverging conical surface from said means to a diameter greater than the diameter of said top and bottom members.

2. A burner for gaseous fuels comprising a hollow burner head, means for conducting a gaseous air and fuel mixture to the interior thereof, means for emitting said mixture horizontally outwardly from the circumference of said head, a .horizontal hearth supported at a fixed elevation,

an upwardly dished air ring concentric with said head and said hearth, means for adjustably positioning said head above said hearth, and means for adjustably positioning said air ring between said head and said hearth, said hearth having a central opening for the conduction of secondary combustion air therethrough, said central opening in said hearth having a diameter less than the outer diameter of said air ring, said hearth having an annular slot for the conduction of tertiary air therethrough at a diameter greater than the outer diameter of said air ring, whereby all of said secondary air is diverted around the outer edge of said air ring before mixing with said air and fuel mixture emitted from said burner head and whereby said tertiary air will meet said mixture after said secondary air has mixed therewith.

3. For use with a residential heating furnace The total axial with said burner head, said hearth being provided with an annular secondary air opening and with an annular tertiary air opening, said secondary air opening being of lesser diameter than said air deflecting ring, said tertiary air opening being of greater diameter than said air deflecting ring, said fuel supply means extending vertically and axially throughaxial openings in said air deflecting ring and said hearth, and said air deflecting ring being continuous from said fuel supply means to its outer circular edge,

whereby all of said secondary air is diverted around the outer edge of said air deflecting ring before mixing with the primary air and fuel mixture emitted from said burner head, and said tertiary air will meet said mixture after said secondary air has mixed with said mixture.

4. In combination with a circular gas burner head carried axially at the upper end of vertical means for supplying a mixture of fuel gas and primary air to said head for emission therefrom through radial ports formed in a horizontal circumference thereof into a combustion space, an air deflecting ring supported on said vertical means below said head and extending from said vertical means outwardly to 'a diameter greater than the outer diameter of said head, a hearth means supported coaxially of said vertical means below said air deflecting ring, said hearth means being formed with a central opening vertically therethrough of greater diameter than said vertical means and lesser diameter than the outer diameter of said air deflecting ring, said hearth means being formed with an interrupted annular opening vertically therethrough at a diameter greater than the outer diameter and means for supplying air for combustion to the underside of said hearth whereby secondary combustion 'air will be supplied to said combustion space through said central opening in said hearth and tertiary combustion air will be supplied to said combustion space through said annular opening in said hearth.

RICHARD C. WRIGHT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number 

